Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 14)
14.
If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:
Answer: Option
Explanation:
| Required average |
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| = 54.68 |
Discussion:
22 comments Page 3 of 3.
Vamsi said:
2 years ago
The correct answer is 53.03 not 54.68.
(10)
Gourav Singh said:
1 month ago
Given
Batch 1: 55 students, average = 50
Batch 2: 60 students, average = 55
Batch 3: 45 students, average = 60
Step 1: Find total marks of each batch
Batch 1 total = 55 × 50 = 2750
Batch 2 total = 60 × 55 = 3300.
Batch 3 total = 45 × 60 = 2700
Step 2: Find the overall total marks and students.
Total marks = 2750 + 3300 + 2700 = 8750.
Total students = 55 + 60 + 45 = 160.
Step 3: Find the overall average.
Average.
= 8750/ 160.
= 54.6875.
Batch 1: 55 students, average = 50
Batch 2: 60 students, average = 55
Batch 3: 45 students, average = 60
Step 1: Find total marks of each batch
Batch 1 total = 55 × 50 = 2750
Batch 2 total = 60 × 55 = 3300.
Batch 3 total = 45 × 60 = 2700
Step 2: Find the overall total marks and students.
Total marks = 2750 + 3300 + 2700 = 8750.
Total students = 55 + 60 + 45 = 160.
Step 3: Find the overall average.
Average.
= 8750/ 160.
= 54.6875.
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